Universität zu Köln

Thupakula, Umamahesh ORCID: 0000-0003-0508-6029, Laha, Priya ORCID: 0000-0002-9519-1203, Lippertz, Gertjan ORCID: 0000-0002-4061-7027, Schouteden, Koen ORCID: 0000-0002-5975-585X, Netsou, Asteriona-Maria, Seliverstov, Aleksandr, Terryn, Herman ORCID: 0000-0003-2639-5496, Pereira, Lino M. C. and Van Haesendonck, Chris (2022). Two-dimensional tellurium superstructures on Au(111) surfaces. J. Chem. Phys., 157 (16). MELVILLE: AIP Publishing. ISSN 1089-7690

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Abstract

Two-dimensional (2D) allotropes of tellurium (Te), recently coined as tellurene, are currently an emerging topic of materials research due to the theoretically predicted exotic properties of Te in its ultrathin form and at the single atomic layer limit. However, a prerequisite for the production of such new and single elemental 2D materials is the development of simple and robust fabrication methods. In the present work, we report three different 2D superstructures of Te on Au(111) surfaces by following an alternative experimental deposition approach. We have investigated the superstructures using low-temperature scanning tunneling microscopy and spectroscopy, Auger electron spectroscopy (AES), and field emission AES. Three superstructures (13 x 13, 8 x 4, and & RADIC;11 x & RADIC;11) of 2D Te are observed in our experiments, and the formation of these superstructures is accompanied by the lifting of the characteristic 23 x & RADIC;3 surface reconstruction of the Au(111) surface. Scanning tunneling spectroscopy reveals a strong dependence of the local electronic properties on the structural arrangement of the Te atoms on the Au(111) support, and we observe superstructure-dependent electronic resonances around the Fermi level and below the Au(111) conduction band. In addition to the appearance of the new electronic resonances, the emergence of band gaps with a p-type charge character has been evidenced for two out of three Te superstructures (13 x 13 and root 11 x root 11) on the Au(111) support. Published under an exclusive license by AIP Publishing.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Thupakula, Umamahesh UNSPECIFIED orcid.org/0000-0003-0508-6029 UNSPECIFIED Laha, Priya UNSPECIFIED orcid.org/0000-0002-9519-1203 UNSPECIFIED Lippertz, Gertjan UNSPECIFIED orcid.org/0000-0002-4061-7027 UNSPECIFIED Schouteden, Koen UNSPECIFIED orcid.org/0000-0002-5975-585X UNSPECIFIED Netsou, Asteriona-Maria UNSPECIFIED UNSPECIFIED UNSPECIFIED Seliverstov, Aleksandr UNSPECIFIED UNSPECIFIED UNSPECIFIED Terryn, Herman UNSPECIFIED orcid.org/0000-0003-2639-5496 UNSPECIFIED Pereira, Lino M. C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Van Haesendonck, Chris UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-672618
DOI:	10.1063/5.0104652
Journal or Publication Title:	J. Chem. Phys.
Volume:	157
Number:	16
Date:	2022
Publisher:	AIP Publishing
Place of Publication:	MELVILLE
ISSN:	1089-7690
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SCANNING-TUNNELING-MICROSCOPY; BAND-STRUCTURE; ATOMIC LAYERS; TE FILM; ELECTRODEPOSITION; GROWTH; STM; SELENIUM; AU(100) Multiple languages Chemistry, Physical; Physics, Atomic, Molecular & Chemical Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/67261